CN111502126A - Built-in sleeve grouting connection steel pipe concrete composite column and construction method thereof - Google Patents
Built-in sleeve grouting connection steel pipe concrete composite column and construction method thereof Download PDFInfo
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- CN111502126A CN111502126A CN202010330849.0A CN202010330849A CN111502126A CN 111502126 A CN111502126 A CN 111502126A CN 202010330849 A CN202010330849 A CN 202010330849A CN 111502126 A CN111502126 A CN 111502126A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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Abstract
The invention discloses a built-in sleeve grouting connection steel pipe concrete composite column and a construction method thereof, and relates to the technical field of steel pipe concrete composite column grouting connection.
Description
Technical Field
The invention relates to the technical field of steel pipe concrete composite column grouting connection, in particular to a steel pipe concrete composite column connected through built-in sleeve grouting and a construction method thereof.
Background
The steel tube concrete composite column consists of an inner steel tube concrete column and an outer reinforced concrete column, and the respective advantages of the two types of columns are fully exerted. Compared with the common concrete-filled steel tube column, the concrete-filled steel tube composite column has better fire resistance and corrosion resistance under the protection and constraint action of external reinforced concrete. The steel pipe concrete composite column has higher strength and better ductility compared to the reinforced concrete column, and allows the use of high-strength concrete as core concrete in the inner steel pipe, thereby reducing the column sectional size. Due to the excellent structural performance, the steel tube concrete composite column is widely applied to high-rise buildings and piers in areas with frequent earthquakes in China.
In order to promote the industrial development of buildings and accelerate the on-site construction efficiency, in more and more buildings, the concrete-filled steel tube composite column adopts a construction mode of factory prefabrication and on-site assembly. In order to realize the construction mode, the prefabricated concrete-filled steel tube composite column is produced, but the middle part of the existing prefabricated concrete-filled steel tube composite column is connected by an external sleeve, and the external sleeve is poor in fire resistance and corrosion resistance, so that the service life of the prefabricated concrete-filled steel tube composite column is short.
Therefore, how to prolong the service life of the prefabricated concrete-filled steel tube composite column becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a built-in sleeve grouting connection steel pipe concrete composite column and a construction method thereof, so as to prolong the service life of the prefabricated steel pipe concrete composite column.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a built-in sleeve grouting connection steel pipe concrete composite column, which comprises: the upper steel tube concrete superposed column comprises an upper externally-cast concrete layer and an upper framework, wherein the upper framework comprises an upper central steel tube, an upper exposed central steel tube, a plurality of upper longitudinal bars, a plurality of upper stirrups and a plurality of semi-grouting sleeves, the upper central steel tube is parallel to the axis of the upper longitudinal bars, the plurality of upper longitudinal bars are uniformly arranged along the circumferential direction of the upper central steel tube, the plurality of upper stirrups are uniformly arranged along the axial direction of the upper longitudinal bars, one upper stirrup corresponds to the plurality of upper longitudinal bars, one upper stirrup is hooped outside the plurality of upper longitudinal bars, the upper externally-cast concrete layer is cast outside the upper central steel tube, the upper longitudinal bars and the upper stirrups are embedded in the upper externally-cast concrete layer, the upper central steel tube penetrates through the upper externally-cast concrete layer, and the bottom end of the upper central steel tube extends downwards along the axis direction to form the upper externally-exposed central steel tube, the upper central steel pipe and the upper exposed central steel pipe are internally filled with upper core concrete, the semi-grouting sleeves correspond to the upper longitudinal ribs one by one, and the upper ends of the semi-grouting sleeves are sleeved at the lower ends of the upper longitudinal ribs and detachably connected with the lower ends of the upper longitudinal ribs; the lower steel tube concrete superposed column comprises a lower externally-cast concrete layer and a lower framework, wherein the lower framework comprises a lower central steel tube, a lower externally-exposed central steel tube, a plurality of lower longitudinal bars, a plurality of lower stirrups and a plurality of lower externally-exposed stirrups, the lower central steel tube is parallel to the axis of the lower longitudinal bars, the lower longitudinal bars are uniformly arranged along the circumferential direction of the lower central steel tube, the lower stirrups are uniformly arranged along the axial direction of the lower longitudinal bars, one lower stirrup corresponds to the lower longitudinal bars, one lower stirrup is hooped outside the lower longitudinal bars, the lower externally-cast concrete layer is poured outside the lower central steel tube, the lower longitudinal bars and the lower stirrups are embedded in the lower externally-cast concrete layer, the lower central steel tube penetrates through the lower externally-cast concrete layer, and the top end of the lower central steel tube extends upwards along the axis direction to form the lower externally-exposed central steel tube, the lower central steel pipe and the lower exposed central steel pipe are internally filled with lower core concrete, each lower longitudinal bar penetrates through the lower externally-cast concrete layer, the top end of each lower longitudinal bar extends upwards along the axis direction of the lower central steel pipe to form a lower exposed longitudinal bar, a plurality of lower exposed stirrups are uniformly arranged along the axial direction of the lower exposed longitudinal bar, one lower exposed stirrup corresponds to the plurality of lower exposed longitudinal bars, one lower exposed stirrup is hooped outside the plurality of lower exposed longitudinal bars, the semi-grouting sleeves correspond to the lower exposed longitudinal bars one by one, and the lower ends of the semi-grouting sleeves are sleeved at the upper ends of the lower exposed longitudinal bars and are connected with the lower exposed longitudinal bars in a grouting manner; a middle connection assembly, which comprises a middle externally cast concrete layer, a steel tube butt-joint positioner, a steel tube butt-joint sleeve and a plurality of semi-grouting sleeves, wherein the top end of the steel tube butt-joint positioner is abutted against the bottom end of the upper externally exposed central steel tube, the bottom end of the steel tube butt-joint positioner is abutted against the top end of the lower externally exposed central steel tube, the steel tube butt-joint positioner is used for ensuring that the upper externally exposed central steel tube and the lower externally exposed central steel tube are coaxial, the steel tube butt-joint sleeve is axially arranged between the upper externally cast concrete layer and the lower externally cast concrete layer and radially arranged between the lower externally exposed longitudinal rib and the lower externally exposed central steel tube, the upper externally exposed central steel tube, the steel tube butt-joint positioner and the lower externally cast central steel tube are all arranged inside the steel tube butt-joint sleeve and are connected with the steel tube butt-joint sleeve, And form a columnar structure with upper portion exterior concrete layer and lower part exterior concrete layer, lower expose longitudinal reinforcement and lower expose stirrup inlay in middle part exterior concrete layer.
Preferably, a limiting groove for positioning the position of the steel pipe butt-joint sleeve is formed in the top end of the lower externally-poured concrete layer in a recessed manner, the bottom end of the steel pipe butt-joint sleeve is arranged in the limiting groove, the bottom end of the steel pipe butt-joint sleeve abuts against the bottom end of the limiting groove, and a grouting space for grouting the inside of the steel pipe butt-joint sleeve is formed between the top end of the steel pipe butt-joint sleeve and the bottom end of the upper externally-poured concrete layer.
Preferably, the steel pipe concrete composite column connected by the built-in sleeve grouting further comprises a plurality of upper outer welding shear keys, a plurality of lower outer welding shear keys and a plurality of inner welding shear keys, the plurality of upper outer welding shear keys are uniformly arranged on the outer side wall of the upper exposed central steel pipe along the axial direction of the upper exposed central steel pipe, the lower outer welding shear keys are uniformly arranged on the outer side wall of the lower exposed central steel pipe along the axial direction of the lower exposed central steel pipe, and the inner welding shear keys are uniformly arranged on the inner side wall of the steel pipe butt sleeve along the axial direction of the steel pipe butt sleeve.
Preferably, the steel pipe concrete composite column connected with the built-in sleeve in a grouting mode further comprises a plurality of grouting assemblies, the grouting assemblies correspond to the semi-grouting sleeves one by one, each grouting assembly comprises a grouting channel and a grout outlet channel, one end of each grouting channel and one end of each grout outlet channel penetrate through the side wall of each semi-grouting sleeve and are communicated with the inside of each semi-grouting sleeve, and the other end of each grouting channel and the other end of each grout outlet channel penetrate through the upper outer pouring concrete layer.
Preferably, the slurry outlet channel and the slurry injection channel are arranged in an up-down opposite mode.
Preferably, the upper end of the half grouting sleeve is provided with an internal thread, and the lower end of the upper longitudinal rib is provided with an external thread matched with the internal thread.
Preferably, go up expose central steel pipe with expose central steel pipe diameter the same down, steel pipe butt joint locator includes steel backing plate, restraint ring muscle and a plurality of radial spacing steel sheet, the top of steel backing plate with the bottom of going up exposing central steel pipe offsets, the bottom with the top of exposing central steel pipe down offsets, and is a plurality of radial spacing steel sheet is followed the lateral wall circumference of steel backing plate evenly sets up, radial spacing steel sheet is used for the restriction go up expose central steel pipe with expose the radial displacement of central steel pipe down, restraint ring muscle cover is located a plurality of the outside of radial spacing steel sheet to it is a plurality of radial spacing steel sheet cramp in on the lateral wall of steel backing plate.
The invention also provides a construction method for connecting the concrete-filled steel tube composite column by grouting the built-in sleeve, which comprises the following steps: firstly, prefabricating the upper concrete-filled steel tube composite column and the lower concrete-filled steel tube composite column in a factory; secondly, abutting the bottom end of the steel pipe butt joint positioner against the top end of the lower exposed central steel pipe; sleeving the steel pipe butt sleeve outside the lower exposed central steel pipe and the steel pipe butt positioner; connecting the upper concrete-filled steel tube composite column and the lower concrete-filled steel tube composite column, and meanwhile, abutting the bottom end of the upper exposed central steel tube against the top end of the steel tube butting positioner; grouting, namely grouting the semi-grouting sleeve connected between the upper longitudinal rib and the lower exposed longitudinal rib, and grouting the interior of the steel pipe butt joint sleeve; and sixthly, erecting a template, and pouring the rest space between the upper concrete-filled steel tube composite column and the lower concrete-filled steel tube composite column to form the middle externally-poured concrete layer.
Preferably, when the upper concrete-filled steel tube composite column and the lower concrete-filled steel tube composite column are prefabricated in the factory in the first step, the upper framework and the lower framework are firstly manufactured, then the upper core concrete and the lower core concrete are poured, the semi-grouting sleeve is connected again, and finally the upper externally-cast concrete layer and the lower externally-cast concrete layer are poured.
Preferably, in the fourth step, each lower exposed longitudinal bar is embedded into the corresponding half grouting sleeve for a certain length, so that the upper concrete-filled steel tube composite column is connected with the lower concrete-filled steel tube composite column.
Compared with the prior art, the invention has the following technical effects:
according to the grouting connection steel pipe concrete composite column with the built-in sleeve and the construction method thereof, the upper exposed central steel pipe and the lower exposed central steel pipe are connected through the steel pipe butt joint sleeve in a grouting mode, the middle externally cast concrete layer is poured outside the steel pipe butt joint sleeve, compared with the prior art that the two exposed steel pipes are connected through the built-in sleeve only, the built-in sleeve grouting connection steel pipe concrete composite column is provided with the middle externally cast concrete layer, the middle externally cast concrete layer is good in fire resistance and corrosion resistance, and the service life of the prefabricated steel pipe concrete composite column is effectively prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a cross-sectional view of a concrete filled steel tube composite column with a built-in sleeve grouting connection provided in an embodiment of the present invention;
fig. 2 is a schematic structural view of an upper concrete filled steel tube composite column provided in an embodiment of the present invention;
fig. 3 is a schematic structural view of a lower concrete filled steel tube composite column provided in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a steel pipe butt joint positioner provided in an embodiment of the present invention;
fig. 5 is a schematic view of a construction method for connecting a concrete filled steel tube composite column by grouting a built-in sleeve according to an embodiment of the present invention;
description of reference numerals:
1-lower steel pipe concrete composite column, 101-lower central steel pipe, 102-lower core concrete, 103-lower outer welding shear key, 104-lower longitudinal bar, 105-lower stirrup, 106-limiting groove, 107-lower exposed central steel pipe, 108-lower exposed longitudinal bar, 109-lower exposed stirrup, 110-lower outer pouring concrete layer, 2-upper steel pipe concrete composite column, 201-upper central steel pipe, 202-upper core concrete, 203-upper outer welding shear key, 204-upper longitudinal bar, 205-upper stirrup, 206-semi grouting sleeve, 207-grouting channel, 208-grout outlet channel, 209-upper exposed central steel pipe, 210-upper outer pouring concrete layer, 3-steel pipe butt joint positioner, 301-radial limiting steel plate, 302-steel backing plate, 302-steel pipe, 303-restraining ring ribs, 4-steel pipe butt joint sleeves, 401-inner welding shear keys, 5-middle outer pouring concrete layer, 6-high-strength grouting material and 7-grouting space.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a built-in sleeve grouting connection steel pipe concrete composite column capable of effectively prolonging the service life of the prefabricated steel pipe concrete composite column and a construction method thereof.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 5, the present embodiment provides a concrete-filled steel tube composite column with a built-in sleeve grouting connection, including: an upper steel pipe concrete superposed column 2 comprises an upper externally cast concrete layer 210 and an upper framework, wherein the upper framework comprises an upper central steel pipe 201, an upper externally exposed central steel pipe 209, a plurality of upper longitudinal bars 204, a plurality of upper stirrups 205 and a plurality of semi-grouting sleeves 206, the upper central steel pipe 201 is parallel to the axis of the upper longitudinal bars 204, the plurality of upper longitudinal bars 204 are uniformly arranged along the circumferential direction of the upper central steel pipe 201, the plurality of upper stirrups 205 are uniformly arranged along the axial direction of the upper longitudinal bars 204, one upper stirrup 205 corresponds to the plurality of upper longitudinal bars 204, one upper stirrup 205 is hooped outside the plurality of upper longitudinal bars 204, the upper externally cast concrete layer 210 is cast outside the upper central steel pipe 201, the upper longitudinal bars 204 and the upper stirrups 205 are embedded in the upper externally cast concrete layer 210, the upper central steel pipe 201 penetrates through the upper externally cast concrete layer 210, the bottom end of the upper central steel pipe 201 extends downwards along the axis direction to form the upper externally exposed central steel pipe 209, and the upper externally exposed central steel pipe 209 are filled with core concrete 202, the half grouting sleeves 206 correspond to the upper longitudinal ribs 204 one by one, and the upper ends of the half grouting sleeves 206 are sleeved at the lower ends of the upper longitudinal ribs 204 and detachably connected with the lower ends of the upper longitudinal ribs 204; the lower steel tube concrete composite column 1 comprises a lower externally cast concrete layer 110 and a lower framework, wherein the lower framework comprises a lower central steel tube 101, a lower externally exposed central steel tube 107, a plurality of lower longitudinal bars 104, a plurality of lower stirrups 105 and a plurality of lower externally exposed stirrups 109, the lower central steel tube 101 is parallel to the axis of the lower longitudinal bars 104, the lower longitudinal bars 104 are uniformly arranged along the circumferential direction of the lower central steel tube 101, the lower stirrups 105 are uniformly arranged along the axial direction of the lower longitudinal bars 104, one lower stirrup 105 corresponds to the lower longitudinal bars 104, one lower stirrup 105 is hooped outside the lower longitudinal bars 104, the lower externally cast concrete layer 110 is cast outside the lower central steel tube 101, the lower longitudinal bars 104 and the lower stirrups 105 are embedded in the lower externally cast concrete layer 110, the lower central steel tube 101 penetrates through the lower externally cast concrete layer 110, the top end of the lower central steel tube 101 extends upwards along the axis direction to form the lower externally exposed central steel tube 107, and the lower externally exposed central steel tube 101 and the lower central steel tube 107 are filled with the core concrete 102, each lower longitudinal bar 104 penetrates through the lower externally-cast concrete layer 110, the top end of each lower longitudinal bar extends upwards along the axis direction of the lower longitudinal bar to form a lower exposed longitudinal bar 108, a plurality of lower exposed stirrups 109 are uniformly arranged along the axial direction of the lower exposed longitudinal bar 108, one lower exposed stirrup 109 corresponds to the plurality of lower exposed longitudinal bars 108, one lower exposed stirrup 109 is hooped outside the plurality of lower exposed longitudinal bars 108, the half grouting sleeves 206 correspond to the lower exposed longitudinal bars 108 one by one, and the lower end of each half grouting sleeve 206 is sleeved at the upper end of the corresponding lower exposed longitudinal bar 108 and connected with the corresponding lower exposed longitudinal bar 108 in a grouting manner; a middle connection assembly, which comprises a middle externally cast concrete layer 5, a steel tube butt-joint positioner 3, a steel tube butt-joint sleeve 4 and a plurality of semi-grouting sleeves 206, wherein the top end of the steel tube butt-joint positioner 3 abuts against the bottom end of an upper externally exposed central steel tube 209, the bottom end abuts against the top end of a lower externally exposed central steel tube 107, the steel tube butt-joint positioner 3 is used for ensuring that the upper externally exposed central steel tube 209 and the lower externally exposed central steel tube 107 are coaxial, the steel tube butt-joint sleeve 4 is axially arranged between an upper externally cast concrete layer 210 and a lower externally cast concrete layer 110 and radially arranged between a lower externally exposed longitudinal rib 108 and the lower externally exposed central steel tube 107, the upper externally exposed central steel tube 209, the steel tube butt-joint positioner 3 and the lower externally cast concrete layer 107 are all arranged inside the steel tube butt-joint sleeve 4 and are connected with the steel tube butt-joint sleeve 4 in a grouting manner, the middle externally cast concrete layer 5 is poured outside, the lower exposed longitudinal bar 108 and the lower exposed stirrup 109 are embedded in the middle outer cast concrete layer 5. Specifically, the middle outer cast-in-place concrete layer 5 forms a rectangular parallelepiped structure with the upper outer cast-in-place concrete layer 210 and the lower outer cast-in-place concrete layer 110. The number of the upper longitudinal ribs 204 and the number of the lower longitudinal ribs 104 are four. The specific number of upper stirrups 205, lower stirrups 105 and lower exposed stirrups 109 is as appropriate. High-strength grouting material 6 is injected into the steel pipe butt joint sleeve 4. This built-in sleeve grout connects steel pipe concrete composite post has set up middle part outer cast concrete layer 5 to make steel pipe butt joint sleeve 4 wrap up inside middle part outer cast concrete layer 5, effectively prolonged the life of prefabricated formula steel pipe concrete composite post. In addition, the steel pipe butt joint sleeve 4 is arranged in the middle externally poured concrete layer 5, so that the condition that slurry leaks outwards is effectively avoided.
In a specific use process, the upper core concrete 202 in the upper central steel pipe 201 and the lower core concrete 102 in the lower central steel pipe 101 are respectively restrained by the steel pipe and the stirrup from inside to outside; the upper core concrete 202 in the upper exposed central steel pipe 209 and the lower core concrete 102 in the lower exposed central steel pipe 107 are respectively constrained by three layers of steel pipes, steel pipe butting sleeves 4 and stirrups from inside to outside.
As shown in fig. 1 and 3, in the present embodiment, a limiting groove 106 for positioning the position of the steel pipe docking sleeve 4 is formed in a recessed manner at the top end of the lower externally cast concrete layer 110, the bottom end of the steel pipe docking sleeve 4 is disposed in the limiting groove 106, the bottom end of the steel pipe docking sleeve 4 abuts against the bottom end of the limiting groove 106, and a grouting space 7 for grouting the inside of the steel pipe docking sleeve 4 is formed between the top end and the bottom end of the upper externally cast concrete layer 210. The limiting groove 106 is an annular limiting groove 106, the inner diameter of the limiting groove 106 is the same as the outer diameter of the steel pipe butt joint sleeve 4, and the depth of the limiting groove 106 can be freely adjusted as required. In the specific use process, open grouting is performed by using the grouting space 7 between the steel pipe butt sleeve 4 and the bottom end of the upper externally cast concrete layer 210 to ensure that grouting is dense, so that the upper exposed central steel pipe 209 and the lower exposed central steel pipe 107 are connected in a full grouting manner in the steel pipe butt sleeve 4.
As shown in fig. 1-3, in the present embodiment, the internal sleeve grouting-connected concrete-filled steel tube composite column further includes a plurality of upper outer welding shear keys 203, a plurality of lower outer welding shear keys 103, and a plurality of inner welding shear keys 401, the plurality of upper outer welding shear keys 203 are uniformly disposed on the outer sidewall of the upper exposed central steel tube 209 along the axial direction of the upper exposed central steel tube 209, the lower outer welding shear keys 103 are uniformly disposed on the outer sidewall of the lower exposed central steel tube 107 along the axial direction of the lower exposed central steel tube 107, and the inner welding shear keys 401 are uniformly disposed on the inner sidewall of the steel tube docking sleeve 4 along the axial direction of the steel tube docking sleeve 4. The specific number of upper outer weld shear keys 203, lower outer weld shear keys 103, and inner weld shear keys 401 is contingent on the situation. The upper outer welding shear key 203, the lower outer welding shear key 103 and the inner welding shear key 401 enhance the bonding strength between the upper outer welding shear key 203, the lower outer welding shear key 103, the inner welding shear key 401 and the high-strength grouting material 6, ensure that the internal grouting material is always in a pressed state no matter the whole structure is pulled or pressed, and effectively play the high-strength characteristic of the grouting material.
As shown in fig. 2, in this embodiment, the steel pipe concrete composite column connected by grouting with a built-in sleeve further includes a plurality of grouting components, the grouting components correspond to the half-grouting sleeves 206 one to one, each grouting component includes a grouting channel 207 and a grout outlet channel 208, one end of each grouting channel 207 and one end of each grout outlet channel 208 penetrate through the side wall of the half-grouting sleeve 206 and are communicated with the inside of the half-grouting sleeve 206, and the other end of each grouting channel 207 and one end of each grout outlet channel 208 penetrate through the upper outer-poured concrete layer 210. In a specific using process, grouting is performed into the half grouting sleeve 206 through the grouting channel 207, and whether the half grouting sleeve 206 is full or not is judged according to the grout outlet channel 208. Specifically, the slurry outlet channel 208 and the slurry injection channel 207 are arranged opposite to each other in the vertical direction.
In this embodiment, the upper end of the half grouting sleeve 206 is provided with an internal thread, and the lower end of the upper longitudinal rib 204 is provided with an external thread matching with the internal thread. The threaded connection, half grout sleeve 206 and last vertical muscle 204 easy dismounting.
As shown in fig. 4, in the present embodiment, the diameters of the upper exposed central steel tube 209 and the lower exposed central steel tube 107 are the same, the steel tube butt-joint positioner 3 includes a steel shim plate 302, a restraining ring rib 303 and a plurality of radial limiting steel plates 301, the top end of the steel shim plate 302 abuts against the bottom end of the upper exposed central steel tube 209, the bottom end abuts against the top end of the lower exposed central steel tube 107, the plurality of radial limiting steel plates 301 are uniformly arranged along the circumferential direction of the outer side wall of the steel shim plate 302, the radial limiting steel plates 301 are used for limiting the radial displacement of the upper exposed central steel tube 209 and the lower exposed central steel tube 107, the restraining ring rib 303 is sleeved outside the plurality of radial limiting steel plates 301, and the plurality of radial limiting steel plates 301 are tightly hooped on the. The specific number of radial restraining steel plates 301 is contingent on circumstances. The radial limiting steel plate 301 is of an arc-shaped structure. The steel shim plate 302 is of circular configuration. The two ends of the steel backing plate 302 are respectively contacted with the lower exposed central steel pipe 107 and the upper exposed central steel pipe 209 to separate the two, so that the local damage of the end part of the steel pipe is avoided, the diameter of the inner arc surface of the radial limiting steel plate 301 is the same as the outer diameters of the lower exposed central steel pipe 107 and the upper exposed central steel pipe 209, the inner arc surface of the radial limiting steel plate 301 is contacted with the outer walls of the lower exposed central steel pipe 107 and the upper exposed central steel pipe 209, the coaxiality of the lower exposed central steel pipe 107 and the upper exposed central steel pipe 209 is ensured, and the radial limiting steel plate 301 is enhanced in the positioning.
As shown in fig. 5, the present embodiment further provides a construction method for connecting a concrete filled steel tube composite column by grouting a built-in sleeve, including the following steps:
firstly, prefabricating an upper concrete-filled steel tube composite column 2 and a lower concrete-filled steel tube composite column 1 in a factory;
secondly, abutting the bottom end of the steel pipe butt joint positioner 3 against the top end of the lower exposed central steel pipe 107;
step three, sleeving the steel pipe butting sleeve 4 outside the lower exposed central steel pipe 107 and the steel pipe butting positioner 3;
connecting the upper concrete-filled steel tube composite column 2 with the lower concrete-filled steel tube composite column 1, and meanwhile, abutting the bottom end of the upper exposed central steel tube 209 against the top end of the steel tube butting positioner 3;
fifthly, grouting, namely grouting the semi-grouting sleeve 206 connected between the upper longitudinal rib 204 and the lower exposed longitudinal rib 108, and grouting the interior of the steel pipe butt joint sleeve 4;
and sixthly, erecting a template, and pouring the rest space between the upper concrete-filled steel tube composite column 2 and the lower concrete-filled steel tube composite column 1 to form a middle externally-poured concrete layer 5.
In this embodiment, when the upper steel pipe concrete composite column 2 and the lower steel pipe concrete composite column 1 are prefabricated in the factory in the first step, the upper framework and the lower framework are firstly manufactured, then the upper core concrete 202 and the lower core concrete 102 are poured, then the half grouting sleeve 206 is connected, and finally the upper outer casting concrete layer 210 and the lower outer casting concrete layer 110 are poured by erecting the formwork.
In the fourth step, each lower exposed longitudinal rib 108 is embedded into the corresponding half grouting sleeve 206 for a certain length, so that the upper concrete-filled steel tube composite column 2 is connected with the lower concrete-filled steel tube composite column 1.
It should be noted that the upper and lower portions and the top and bottom portions in the present embodiment are referred to when they are arranged as shown in fig. 1.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a built-in sleeve grout connects steel pipe concrete composite post which characterized in that includes:
the upper steel tube concrete superposed column comprises an upper externally-cast concrete layer and an upper framework, wherein the upper framework comprises an upper central steel tube, an upper exposed central steel tube, a plurality of upper longitudinal bars, a plurality of upper stirrups and a plurality of semi-grouting sleeves, the upper central steel tube is parallel to the axis of the upper longitudinal bars, the plurality of upper longitudinal bars are uniformly arranged along the circumferential direction of the upper central steel tube, the plurality of upper stirrups are uniformly arranged along the axial direction of the upper longitudinal bars, one upper stirrup corresponds to the plurality of upper longitudinal bars, one upper stirrup is hooped outside the plurality of upper longitudinal bars, the upper externally-cast concrete layer is cast outside the upper central steel tube, the upper longitudinal bars and the upper stirrups are embedded in the upper externally-cast concrete layer, the upper central steel tube penetrates through the upper externally-cast concrete layer, and the bottom end of the upper central steel tube extends downwards along the axis direction to form the upper externally-exposed central steel tube, the upper central steel pipe and the upper exposed central steel pipe are internally filled with upper core concrete, the semi-grouting sleeves correspond to the upper longitudinal ribs one by one, and the upper ends of the semi-grouting sleeves are sleeved at the lower ends of the upper longitudinal ribs and detachably connected with the lower ends of the upper longitudinal ribs;
the lower steel tube concrete superposed column comprises a lower externally-cast concrete layer and a lower framework, wherein the lower framework comprises a lower central steel tube, a lower externally-exposed central steel tube, a plurality of lower longitudinal bars, a plurality of lower stirrups and a plurality of lower externally-exposed stirrups, the lower central steel tube is parallel to the axis of the lower longitudinal bars, the lower longitudinal bars are uniformly arranged along the circumferential direction of the lower central steel tube, the lower stirrups are uniformly arranged along the axial direction of the lower longitudinal bars, one lower stirrup corresponds to the lower longitudinal bars, one lower stirrup is hooped outside the lower longitudinal bars, the lower externally-cast concrete layer is poured outside the lower central steel tube, the lower longitudinal bars and the lower stirrups are embedded in the lower externally-cast concrete layer, the lower central steel tube penetrates through the lower externally-cast concrete layer, and the top end of the lower central steel tube extends upwards along the axis direction to form the lower externally-exposed central steel tube, the lower central steel pipe and the lower exposed central steel pipe are internally filled with lower core concrete, each lower longitudinal bar penetrates through the lower externally-cast concrete layer, the top end of each lower longitudinal bar extends upwards along the axis direction of the lower central steel pipe to form a lower exposed longitudinal bar, a plurality of lower exposed stirrups are uniformly arranged along the axial direction of the lower exposed longitudinal bar, one lower exposed stirrup corresponds to the plurality of lower exposed longitudinal bars, one lower exposed stirrup is hooped outside the plurality of lower exposed longitudinal bars, the semi-grouting sleeves correspond to the lower exposed longitudinal bars one by one, and the lower ends of the semi-grouting sleeves are sleeved at the upper ends of the lower exposed longitudinal bars and are connected with the lower exposed longitudinal bars in a grouting manner;
a middle connection assembly, which comprises a middle externally cast concrete layer, a steel tube butt-joint positioner, a steel tube butt-joint sleeve and a plurality of semi-grouting sleeves, wherein the top end of the steel tube butt-joint positioner is abutted against the bottom end of the upper externally exposed central steel tube, the bottom end of the steel tube butt-joint positioner is abutted against the top end of the lower externally exposed central steel tube, the steel tube butt-joint positioner is used for ensuring that the upper externally exposed central steel tube and the lower externally exposed central steel tube are coaxial, the steel tube butt-joint sleeve is axially arranged between the upper externally cast concrete layer and the lower externally cast concrete layer and radially arranged between the lower externally exposed longitudinal rib and the lower externally exposed central steel tube, the upper externally exposed central steel tube, the steel tube butt-joint positioner and the lower externally cast central steel tube are all arranged inside the steel tube butt-joint sleeve and are connected with the steel tube butt-joint sleeve, And form a columnar structure with upper portion exterior concrete layer and lower part exterior concrete layer, lower expose longitudinal reinforcement and lower expose stirrup inlay in middle part exterior concrete layer.
2. The grouting connection steel pipe concrete composite column with the built-in sleeve according to claim 1, wherein a limiting groove for positioning the position of the steel pipe butting sleeve is formed at the top end of the lower externally cast concrete layer in a recessed manner, the bottom end of the steel pipe butting sleeve is arranged in the limiting groove, the bottom end of the steel pipe butting sleeve abuts against the bottom end of the limiting groove, and a grouting space for grouting the interior of the steel pipe butting sleeve is formed between the top end of the steel pipe butting sleeve and the bottom end of the upper externally cast concrete layer.
3. The grouting-connected steel pipe concrete composite column with built-in sleeves according to claim 1, further comprising a plurality of upper outer welding shear keys, a plurality of lower outer welding shear keys and a plurality of inner welding shear keys, wherein the plurality of upper outer welding shear keys are uniformly arranged on the outer side wall of the upper exposed central steel pipe along the axial direction of the upper exposed central steel pipe, the plurality of lower outer welding shear keys are uniformly arranged on the outer side wall of the lower exposed central steel pipe along the axial direction of the lower exposed central steel pipe, and the plurality of inner welding shear keys are uniformly arranged on the inner side wall of the steel pipe butt-joint sleeve along the axial direction of the steel pipe butt-joint sleeve.
4. The grouting connection steel pipe concrete composite column with the built-in sleeve according to claim 1, further comprising a plurality of grouting assemblies, wherein the grouting assemblies correspond to the semi-grouting sleeves one to one, each grouting assembly comprises a grouting channel and a grout outlet channel, one end of each grouting channel and one end of each grout outlet channel penetrate through the side wall of the semi-grouting sleeve and are communicated with the inside of the semi-grouting sleeve, and the other end of each grouting channel and the other end of each grout outlet channel penetrate through the upper externally-poured concrete layer.
5. The built-in sleeve grouting connection steel pipe concrete composite column according to claim 4, wherein the grout outlet channel and the grouting channel are arranged opposite to each other in the vertical direction.
6. The grouting connection steel pipe concrete composite column with the built-in sleeve according to claim 1, wherein the upper end of the semi-grouting sleeve is provided with an internal thread, and the lower end of the upper longitudinal rib is provided with an external thread matched with the internal thread.
7. The grouting-connected steel pipe concrete composite column with a built-in sleeve according to claim 1, wherein the diameter of the upper exposed central steel pipe is the same as that of the lower exposed central steel pipe, the steel pipe butt-joint positioner comprises a steel backing plate, a restraining ring rib and a plurality of radial limiting steel plates, the top end of the steel backing plate abuts against the bottom end of the upper exposed central steel pipe, the bottom end of the steel backing plate abuts against the top end of the lower exposed central steel pipe, the plurality of radial limiting steel plates are uniformly arranged along the circumferential direction of the outer side wall of the steel backing plate, the radial limiting steel plates are used for limiting the radial displacement of the upper exposed central steel pipe and the lower exposed central steel pipe, and the restraining ring rib is sleeved outside the plurality of radial limiting steel plates and hoops the plurality of radial limiting steel plates on the outer side wall of the steel backing plate.
8. A construction method for connecting a concrete filled steel tube composite column by grouting with a built-in sleeve according to any one of claims 1 to 7, characterized by comprising the following steps:
firstly, prefabricating the upper concrete-filled steel tube composite column and the lower concrete-filled steel tube composite column in a factory;
secondly, abutting the bottom end of the steel pipe butt joint positioner against the top end of the lower exposed central steel pipe;
sleeving the steel pipe butt sleeve outside the lower exposed central steel pipe and the steel pipe butt positioner;
connecting the upper concrete-filled steel tube composite column and the lower concrete-filled steel tube composite column, and meanwhile, abutting the bottom end of the upper exposed central steel tube against the top end of the steel tube butting positioner;
grouting, namely grouting the semi-grouting sleeve connected between the upper longitudinal rib and the lower exposed longitudinal rib, and grouting the interior of the steel pipe butt joint sleeve;
and sixthly, erecting a template, and pouring the rest space between the upper concrete-filled steel tube composite column and the lower concrete-filled steel tube composite column to form the middle externally-poured concrete layer.
9. The construction method of the steel pipe concrete composite column connected by grouting with the built-in sleeve according to claim 8, wherein when the upper steel pipe concrete composite column and the lower steel pipe concrete composite column are prefabricated in the factory in the step one, the upper framework and the lower framework are firstly manufactured, the upper core concrete and the lower core concrete are then poured, the semi-grouting sleeve is connected again, and the upper outer-poured concrete layer and the lower outer-poured concrete layer are finally poured.
10. The construction method of the concrete-filled steel tube composite column through grouting of the built-in sleeve according to claim 8, wherein in the fourth step, each lower exposed longitudinal bar is embedded in the corresponding half grouting sleeve for a certain length so as to connect the upper concrete-filled steel tube composite column with the lower concrete-filled steel tube composite column.
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